Question

我必须实施包装系统。我在表格中有以下表格和插入内容：

--a
create table client(
IdClient number(5),
NameClient varchar2(20),
Address varchar2(20),
primary key(IdClient)
);

create table tpackage(
IdPackage number(5),
IdClient number(5),
WLocation varchar2(20),
Courier varchar2(20),
DeliveryTime date,
Status varchar2(20),
primary key(IdPackage),
constraint fk_package foreign key(IdClient) references client(IdClient)
);

insert into client values(1,'Robb','Dimitrie Cantemir 1');
insert into client values(2,'Ion','Aleea Cascadei 15');
insert into client values(3,'Popan','Progresului 1');
insert into client values(4,'Pop','Carei 15');
insert into client values(5,'Grozavescu','Vasile Pirvan 1');
insert into client values(6,'Popa','Orsova 11');

insert into tpackage values(01,1,'Diminetii 2','Ilie','22-Jan-2017','in-transit');
insert into tpackage values(02,6,'Liege 1','Popescu','23-NOV-2016','delivered');
insert into tpackage values(03,4,'Crisana 3','Alexandru','20-Jan-2017','in-transit');
insert into tpackage values(04,3,'Torontal 14','Stefan','18-Dec-2016','delivered');
insert into tpackage values(05,2,'Carei 15','Ionescu','23-Feb-2017','in-transit');

我必须实现一个存储过程，该存储过程显示作为参数给出的客户端传输包的所有包信息。这是我到目前为止所做的：

create or replace procedure displayPackages(i_IdClient number) as 
begin
--SELECT t.Status from tpackage as t inner join client as c on t.IdClient = c.IdClient where t.Status='in-transit' and c.IdClient = IdClient and t.IdClient = IdClient and c.IdClient = t.IdClient;
select t.status,c.NameClient from tpackage t,client c where t.Status='in-transit' and c.IdClient = i_IdClient and c.IdClient = t.IdClient;
end displayPackages;

但这不起作用。提前谢谢！

Answer 1

在PL / SQL中你不能只选择。您需要指定将存储查询结果的变量。

create or replace procedure displayPackages(i_IdClient number) as 
tstatus tpackage.status%type;
cname client.NameClient%type;
begin
select t.status,c.NameClient into tstatus, cname 
  from tpackage t inner join client c on (c.IdClient = t.IdClient)
  where t.Status='in-transit' and c.IdClient = i_IdClient;
--after selecting data into variables you can do your calculations or other operations on variables
end displayPackages;

SQL：显示存储过程中表的结果

1 个答案: